Handicapping involves taking multiple bits of information and then applying a final grade (or odds )to each horse. Information should be treated on a weighted value scale; For example Tomlinson Numbers may be insightful but as a factor its weight is not very much and shouldn't be one of the key factors used to predict the order of finish.
Clockers Reports on the other hand give me insight into the animals physical condition and how well the runner is training. While the bias of the clockers comments are present and should be discounted, the work itself should be factored within your personal weighting system. I tend to ignore the times a bit, just listening to hear that they are within the right band, but focus on the final 1/4, final 1/8, the gallop out, how the horse moved, who was working at the time, the time of the work in relation to the renovation break, etc.
You can pay for some really good clocker reports but DRF always has Mike Welsch on the scene and its free. Thanks to DRF.